Definitions for aə; when stressed eɪ

This page provides all possible meanings and translations of the word a

Princeton's WordNet(0.00 / 0 votes)Rate this definition:

angstrom, angstrom unit, A(noun)

a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation

vitamin A, antiophthalmic factor, axerophthol, A(noun)

any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes

deoxyadenosine monophosphate, A(noun)

one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)

adenine, A(noun)

(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA

ampere, amp, A(noun)

the basic unit of electric current adopted under the Systeme International d'Unites

"a typical household circuit carries 15 to 50 amps"

A, a(noun)

the 1st letter of the Roman alphabet

A, type A, group A(noun)

the blood group whose red cells carry the A antigen

Wiktionary(0.00 / 0 votes)Rate this definition:

a(Pronoun)

Alternate form of a.

a(Pronoun)

Alternate form of a.

A(Noun)

An academic grade issued by certain educational institutions. Slightly better than an A.

I give this novel an A+.

A(Noun)

The highest possible rating.

I give this novel an A+.

A(Noun)

An academic grade. Where it is used, it is often the best class of result.

I give this novel an A+.

A(Noun)

A best-first graph search algorithm for finding a lowest cost path to a goal.

a(Adverb)

Alternate spelling of a

a(Adjective)

Alternate spelling of a

Webster Dictionary(0.00 / 0 votes)Rate this definition:

A

the first letter of the English and of many other alphabets. The capital A of the alphabets of Middle and Western Europe, as also the small letter (a), besides the forms in Italic, black letter, etc., are all descended from the old Latin A, which was borrowed from the Greek Alpha, of the same form; and this was made from the first letter (/) of the Phoenician alphabet, the equivalent of the Hebrew Aleph, and itself from the Egyptian origin. The Aleph was a consonant letter, with a guttural breath sound that was not an element of Greek articulation; and the Greeks took it to represent their vowel Alpha with the a sound, the Phoenician alphabet having no vowel symbols

A

the name of the sixth tone in the model major scale (that in C), or the first tone of the minor scale, which is named after it the scale in A minor. The second string of the violin is tuned to the A in the treble staff. -- A sharp (A/) is the name of a musical tone intermediate between A and B. -- A flat (A/) is the name of a tone intermediate between A and G

A

an adjective, commonly called the indefinite article, and signifying one or any, but less emphatically

A

in each; to or for each; as, "twenty leagues a day", "a hundred pounds a year", "a dollar a yard", etc

A

in; on; at; by

A

in process of; in the act of; into; to; -- used with verbal substantives in -ing which begin with a consonant. This is a shortened form of the preposition an (which was used before the vowel sound); as in a hunting, a building, a begging

A

of

A

a barbarous corruption of have, of he, and sometimes of it and of they

A

an expletive, void of sense, to fill up the meter

Origin: [Shortened form of an. AS. n one. See One.]

Freebase(0.00 / 0 votes)Rate this definition:

A

A is the first letter and vowel in the ISO basic Latin alphabet. It is similar to the Ancient Greek letter alpha, from which it derives.